2. What is the molarity of a HCl solution containing 1.2 grams of hydrochloric acid in 0.025 L of solution?

M

1.3M

Explanation:

Convert from grams to moles:

molar mass of HCl = 1.01g (molar mass of H) + 35.45g (molar mass of Cl) = 36.46g HCl

1.2g HCl (1mol HCl/36.46g HCl)

=.0329 mol HCl

Molarity = mol/L (important formula for concentration)

Plug your values in:

Molarity =.0329mol/.025L

1.317M - but you used two significant figures in the question, so:

1.3M